//
// CFObject.cs
//
// Author: Jeffrey Stedfast <jestedfa@microsoft.com>
//
// Copyright (c) 2013-2017 Xamarin Inc. (www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

using System;
using System.Runtime.InteropServices;

namespace MimeKit.MacInterop {
	abstract class CFObject : IDisposable
	{
		protected const string CoreFoundationLibrary = "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";

		[DllImport (CoreFoundationLibrary, CharSet=CharSet.Unicode)]
		internal extern static IntPtr CFRelease (IntPtr handle);

		[DllImport (CoreFoundationLibrary, CharSet=CharSet.Unicode)]
		internal extern static IntPtr CFRetain (IntPtr handle);

		public IntPtr Handle {
			get; protected set;
		}

		protected CFObject (IntPtr handle, bool owns)
		{
			if (!owns)
				CFRetain (handle);

			Handle = handle;
		}

		protected CFObject ()
		{
		}

		~CFObject ()
		{
			Dispose (false);
		}

		protected virtual void Dispose (bool disposing)
		{
			if (Handle != IntPtr.Zero){
				CFRelease (Handle);
				Handle = IntPtr.Zero;
			}
		}

		public void Dispose ()
		{
			Dispose (true);
			GC.SuppressFinalize (this);
		}
	}
}
